and innovations in shipping technology have grown the shipping industry since the twentieth century. Many of these advances include the size of vessels, the size of fleets, specialty purposes for ships within the fleet, naval architecture and design, and automated ship systems. In terms of commercial interests, the maritime industry has a high level of contestability for shipping lines. This means that the ease of entering and leaving the industry is high. The cause of this is due to the purchase of secondhand ships, the return on which can often be covered fairly quickly for commercial ships. Newer, expensive ships require a larger return on the investment but pay off quickly. This is because these ships typically cater to a larger, more expensive crowd. For instance, new cruise ships can often be paid off within ten years due to the entrepreneurial nature of its intended purpose. Innovations in the shipping industry are also being utilized by shipping lines to find solutions to global problems. For example, modern technology and research is being used to analyze the phenomenon of shipping containers disappearing while at sea. These problems are being researched in part by government agencies, such as the National Oceanic and Atmospheric Administration that operates in the Monterey Bay National Marine Sanctuary. While part of this issue is due to human error as a result of lack of enforcement, advances in technology and ship design hope to improve the rates at which containers may be lost at sea. Other challenges being pursued in the maritime industry include adaptation to a more globalized economy. While the maritime industry has always remained global by nature, shipping lines are now experiencing phenomenon that is unprecedented in scale or unseen at all before the 21st century. Many of these issues surround the nature of increased cooperation in the maritime industry. For instance, cooperation among many shipping lines in the industry is causing an anticompetitive market. This is one of the reasons for the high level of contestability in the shipping industry. With more cooperation among shipping lines, there are larger rates of ships and companies entering and leaving the industry. As of 2019, business and economic analysists are attempting to find solutions to reduce the anticompetitive practices and promote competitive growth in the maritime industry. History British shipping Large-scale shipping lines became widespread in the nineteenth century, after the development of the steamship in 1783.